My left eye is often the one which feels the strain first after sitting infront of the computer for a long time. All because of the window just less than 2 meters away from my left. I never liked curtains. But when I need to do my PC work during the day, I had no choice but to clip a cloth to the window to protect my left eye. Now I think I should go for roller blinds for a long term solution. Hhhmmm…